<!-- 主页面 -->
<template>
<el-container class="home-container">
    <!-- 头部 -->
    <el-header>
        <div>
            <img src="../assets/logo.png" alt="">
            <span>租户控制台</span>
        </div>
        <el-button type="info" plain @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
        <!-- 侧边栏 -->
        <el-aside :width='isCollapse ? "64px" : "200px" '>
            <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区域 -->
                <el-menu 
                background-color="#4a5064" 
                text-color="#fff" 
                active-text-color="#409EFF" 
                :unique-opened = "true" 
                :collapse="isCollapse" 
                :collapse-transition="false" 
                :router="true"
                :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu 
                    :index="item.id + '' " 
                    v-for="item in menuList" 
                    :key="item.id">
                        <!--  -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <el-menu-item 
                        :index=" '/' + subItem.path"  
                        v-for="subItem in item.children" 
                        :key="subItem.id"
                        @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            
        </el-aside>
        
        <!-- 主体 -->
        <el-main>
            <router-view></router-view>
        </el-main>
    </el-container>
</el-container>

</template>

<script>
   export default {
        created() {
            this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        data () {
          return {
                // 侧边栏数据
                menuList: [],
                iconsObj:{
                    '125': 'iconfont icon-user',
                    '103': 'iconfont icon-tijikongjian',
                    '101': 'iconfont icon-shangpin',
                    '102': 'iconfont icon-danju',
                    '145': 'iconfont icon-baobiao'
                },
                // 是否折叠
                isCollapse: false,
                // 侧边栏宽度
                asideWidth: "200px",
                // 被激活的链接地址
                activePath: ''
          };
        },
        methods: {
            logout: function(){
                window.sessionStorage.clear()
                this.$router.push('/login')
            },
            // 获取所有菜单
            getMenuList: async function(){
                // 解构赋值
                const {data: res} = await this.$http.get('menus')
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menuList = res.data
                console.log(res);
            },
            // 点击按钮，切换菜单的折叠/展开
            toggleCollapse: function(){
                this.isCollapse = !this.isCollapse
            },
            // 保存链接的激活状态
            saveNavState: function(activePath) {
                window.sessionStorage.setItem('activePath',activePath)
                this.activePath = activePath
            }
        }
    }

</script>
<style lang='less' scoped>
.home-container {
    height: 100%;
}
.el-header {
    background-color: #536b8b;
    display: flex;
    justify-content: space-between;
    padding-left: 25px;
    align-items: center;
    color: rgb(235, 244, 255);
    font-size: 15px;
    > div {
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #4a5064;
    .el-menu {
        border-right: none;
    }
    line-height: 200px;
}
.el-main {
    background-color: #e0e0e0;
}

.iconfont {
    margin-right: 10px;
}

.toggle-button {
    background-color: #646877;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}

</style>